US3303361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Critical point temperature control method and device for a thermionic generator
Assignee: North American Aviation Corp
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Filing: 1964-12-04
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Granted: 1967-02-07
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Expires: 1984-12-04
Abstract
No abstract record available.
Inventors
- 👤 William R Martini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:17
CPC Classifications
H; H02; H02N; H02N3/00; G; G05; G05D; G05D23/00; G05D23/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A TEMPERATURE CONTROL DEVICE FOR MAINTAINING THE CENTRAL PORTION OF A CONTAINER AT A SUBSTANTIALLY UNIFORM TEMPERATURE WHICH IS THE CRITICAL TEMPERATURE OF A PRESELECTED FLUID HEAT TRANSFER MEDIUM, SAID DEVICE COMPRISING: A CONTAINER, ONE END OF SAID CONTAINER BEING IN HEATEXCHANGING RELATION WITH A SOURCE OF HEAT, THE OTHER END OF SAID CONTAINER BEING IN HEAT-EXCHANGING RELATION WITH A COOLING SOURCE; A SEALED VOLUME TO BE TEMPERATURE CONTROLLED, THE CENTRAL PORTION OF SAID CONTAINER BEING LOCATED IN HEATEXCHANGING RELATION THEREWITH; AND A FLUID HEAT TRANSFER MEDIUM IN A PRESELECTED AMOUNT BY WEIGHT, SAID SEALED VOLUME BEING PARTIALLY FILLED WITH SAID FLUID HEAT TRANSFER MEDIUM, THE RATIO OF THE WEIGHT OF SAID FLUID TO SAID SEALED VOLUME BEING SUBSTANTIALLY EQUAL TO THE CRITICAL DENSITY OF SAID FLUID AT THE CRITICAL TEMPERATURE THEREOF AT WHICH TEMPERATURE SAID VOLUME IS TO BE MAINTAINED.
Claim 2
Dependent Claim
141 words
A TEMPERATURE CONTROL DEVICE FOR MAINTAINING THE CENTRAL PORTION OF A CONTAINER AT A SUBSTANTIALLY UNIFORM TEMPERATURE WHICH IS THE CRITICAL TEMPERATURE OF A PRESELECTED FLUID HEAT TRANSFER MEDIUM, SAID DEVICE COMPRISING: A CONTAINER, ONE END OF SAID CONTAINER BEING IN HEATEXCHANGING RELATION WITH A SOURCE OF HEAT, THE OTHER END OF SAID CONTAINER BEING IN HEAT-EXCHANGING RELATION WITH A COOLING SOURCE; A SEALED VOLUME TO BE TEMPERATURE CONTROLLED, THE CENTRAL PORTION OF SAID CONTAINER BEING LOCATED IN HEATEXCHANGING RELATION THEREWITH; AND A FLUID HEAT TRANSFER MEDIUM IN A PRESELECTED AMOUNT BY WEIGHT, SAID SEALED VOLUME BEING PARTIALLY FILLED WITH SAID FLUID HEAT TRANSFER MEDIUM, THE RATIO OF THE WEIGHT OF SAID FLUID TO SAID SEALED VOLUME BEING SUBSTANTIALLY EQUAL TO THE CRITICAL DENSITY OF SAID FLUID AT THE CRITICAL TEMPERATURE THEREOF AT WHICH TEMPERATURE SAID VOLUME IS TO BE MAINTAINED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |